List questions from elementary-number-theory

Published on 22 Apr 2026 - 9:40

169

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An upper bound for truncatable primess

Published on 10 Apr 2026 - 20:23

141

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Concerning the number $1729$

Published on 14 Apr 2026 - 2:43

205

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Can I construct an integer giving many solutions to the Mordell-equation?

Published on 25 Apr 2026 - 4:37

76

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Euler Totient Integer Remainder Sum Lemma

Published on 14 Apr 2026 - 11:50

61

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$N_k$ is the number of pairs $(a,b)$ of non-negative integers such that $ka+(k+1)b=n+1-k$. Find $N_1+N_2+\cdots N_{n+1}$.

Published on 16 Apr 2026 - 17:04

633

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Prove that for all $x \in \mathbb{Z}_{1729}^{\times}$ holds $x^{1728} \equiv1 \pmod{1729}$

Published on 14 Apr 2026 - 6:36

71

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Modular arithmetic problem from Chinese remainder Theorem

Published on 25 Mar 2026 - 9:32

1k

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Finding units in the ring of integers

Published on 17 Apr 2026 - 15:59

74

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An exercise about probabilities and residue classes

Published on 12 Apr 2026 - 6:51

393

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Proof of sum of modular inverses

Published on 11 Apr 2026 - 4:10

443

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Lifting Solutions to Congruences

Published on 13 Apr 2026 - 10:02

369

Views

Prove that alternating signs never collide in hash table

Published on 17 Apr 2026 - 11:55

105

Views

Step in proof for squares in a sequence

Published on 25 Apr 2026 - 16:39

136

Views

Solve $n!=(n+1)^k-1$ for $n,k$

Published on 15 Apr 2026 - 22:17

List Question

How many numbers from given set of digits?

An upper bound for truncatable primess

Concerning the number $1729$

Can I construct an integer giving many solutions to the Mordell-equation?

Euler Totient Integer Remainder Sum Lemma

$N_k$ is the number of pairs $(a,b)$ of non-negative integers such that $ka+(k+1)b=n+1-k$. Find $N_1+N_2+\cdots N_{n+1}$.

Prove that for all $x \in \mathbb{Z}_{1729}^{\times}$ holds $x^{1728} \equiv1 \pmod{1729}$

Modular arithmetic problem from Chinese remainder Theorem

Finding units in the ring of integers

An exercise about probabilities and residue classes

Proof of sum of modular inverses

Lifting Solutions to Congruences

Prove that alternating signs never collide in hash table

Step in proof for squares in a sequence

Solve $n!=(n+1)^k-1$ for $n,k$

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